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Published on: June 24, 2018
[Characterization and osteogenic activity of FSP-modified TiNbTaZr/Zn]
Yi Yan1, Zhi Yang, Li-Qiang Wang
1hanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine; College of Stomatology, Shanghai Jiao Tong University; National Center for Stomatology; National Clinical Research Center for Oral Diseases; Shanghai Key Laboratory of Stomatology. Shanghai 200011, China.
Purpose:
To investigate whether Ti-35Nb-2Ta-3Zr/Zn (TNTZ/Zn) composite material processed by friction stir processing has osteogenic activity.
Methods:
Zn was added to the surface of TNTZ alloy by friction stir processing. The control group was TNTZ(TNTZ without FSP), the experimental groups was FSP(FSP without Zn), TNTZ/Zn-0.5 (0.5 mm pre-made holes) and TNTZ/Zn-1(1 mm pre-made holes). Surface characterization was performed by scanning electron microscope and X-ray diffraction. Alkaline phosphatase(ALP) activity of co-cultured rat bone marrow stromal stem cells (BMSCs) and COL-1α, OPN and OCN gene expression were detected by real-time quantitative PCR. SAS version 8.2 software was used for data analysis.
Results:
Zn nanoparticles on the surface of the TNTZ/Zn-1 group were distributed homogeneously, with a diameter range of 70-80 nm. Compared with TNTZ group, the activity of ALP in TNTZ/Zn-0.5 and TNTZ/Zn-1 groups was up-regulated (P<0.05 and P<0.01). Compared with TNTZ group, ALP, COL-1α, OPN and OCN gene expression increased in TNTZ/Zn-0.5 and TNTZ/Zn-1 group, and the difference was statistically significant (P<0.05).
Conclusions:
Through FSP, Zn can be successfully integrated onto the surface of TNTZ alloy with nano-scale microstructures. TNTZ/Zn composite material can effectively induce bone formation and is a potential implant material.
